# Multiply and divide integers using mental and written strategies

 1 Number Detectives: a = 729 2 Hitting The Big Times: Fill in the missing numbers in a vertical multiplication sum 3 Hitting The Big Times: Fill in the missing numbers in a vertical multiplication sum 4 Maths production: Put the correct ending on each multiplication sentence 5 Maths production: Put the correct ending on each multiplication sentence 6 Maths production: Put the correct ending on each multiplication sentence 7 Double Up: 140 8 Double Up: 240 9 Double Up: 160 10 Double Up: 180 11 Double Up: 130 12 Accounting for cars: Money multiplication 13 Drive the dollars: Money multiplication 14 Hitting the big times: *3 *55 x * = 6* 465 15 Hitting the big times: 44626 x 6 = *6**5* 16 Hitting the big times: **457 x 4 = 93 **8 17 Hitting the big times: 82 *4* x 20 = 1 **6 94* 18 Hitting the big times: 51* *37 x 3 = * *48 71* 19 Times Machine: Outputs (x12) 20 Times Machine: Inputs (x6) 21 Times Machine: Write the answer after the numbers have been multiplied 22 Deck the halls: 60 pine cones x 30 Christmas trees 23 Scientifically speaking: 32 children with 7 milk cartons each 24 Granny squares 25 x 15 25 Water the Vines: 16 rows of vines x 110 metres 26 Legal Eagles Coffee Shop: \$7500x12 = \$? 27 Maths production: Complete each number sentence 28 Maths production: Complete each number sentence 29 Maths production: Complete each number sentence 30 Maths production: Complete each number sentence 31 Same or different: Click all the boxes with the same answer 32 Same or different: Click all the boxes with the same answer 33 Same or different: Click all the boxes with the same answer 34 Same or different: Click all the boxes with the same answer 35 Multiplication Simplification: Use doubling and halving to simplify multiplication 36 Multiplication Simplification: Use doubling and halving to simplify multiplication 37 Multiplication Simplification: Use doubling and halving to simplify multiplication 38 Multiplication Simplification: Use doubling and halving to simplify multiplication 39 Maths Production: Complete each number sentence 40 Maths Production: Complete each number sentence 41 Number Production: Complete each number sentence 42 Number Production: Complete each number sentence 43 Number Production: Complete each number sentence 44 Times Machine: Write the correct multiplier on the times machine 45 Times Machine: Write the correct multiplier on the times machine 46 Times Machine: Write the correct multiplier on the times machine 47 Times Machine: Write the correct multiplier on the times machine 48 Times Machine: Write the correct multiplier on the times machine 49 Times Machine x -50 50 Times Machine x -12 51 Times Machine x -6 52 Times Machine x -80 53 Times Machine x -30 54 Hitting the Big Times: Write missing numbers in vertical large number multiplicatiions 55 Hitting the Big Times: Write missing numbers in vertical large number multiplicatiions 56 Hitting the Big Times: Write missing numbers in vertical large number multiplicatiions 57 Number detectives *x-4=-24 58 Number detectives *x-4=-28 59 Number detectives *x3=-27 60 Number detectives *x5=30 61 Number detectives -6x-2=* 62 Number detectives 3x-7=* 63 Number detectives 5x-6=* 64 Number detectives -3x-3=* 65 Number detectives 6x*=-18 66 Number detectives -3x*=12 67 Number detectives -6x*=24 68 Number detectives -2x*=-16 69 Multi-Multiplication-7 x3 x-3 x-2 x-5 70 Multi-Multiplication 6 x-5 x9 x-7 x-4 71 Number detectives *x7=-42 72 Number detectives *x-9=-45 73 Number detectives 35x90 74 Number detectives 820x10x*=1640 75 Multipication Simplification: Simplify multiplication by doubling and halving 76 Multipication Simplification: Simplify multiplication by doubling and halving 77 Multipication Simplification: Simplify multiplication by doubling and halving 78 Multipication Simplification: Simplify multiplication by doubling and halving 79 Multipication Simplification: Simplify multiplication by doubling and halving 80 Find the Mystery Number: Solve multiplication sentences with a symbol for an unknown number 81 Find the Mystery Number: Solve multiplication sentences with a symbol for an unknown number 82 Multiplication Simplification: Use doubling and halving to simplify multiplication 83 Multiplication Simplification: Use doubling and halving to simplify multiplication 84 Multiplication Simplification: Use doubling and halving to simplify multiplication 85 Multiplication Simplification: Use doubling and halving to simplify multiplication 86 Multiplication Simplification: Use doubling and halving to simplify multiplication 87 Division Chain: Three- and four-digit numbers 88 Division Chain: Three- and four-digit numbers 89 Number detectives : 48/80 90 Number detectives : 15/50 91 Number detectives : 32÷40 92 Divide a thousand: 28 000/70 93 Divide a thousand: 48 000/600 94 Divide a thousand 16 488/4 95 Divide a thousand 21 360/30 96 Pie maths: Dollar division 97 Game Buddies: \$270/3 98 Busy bodies: Dollar division 99 Divide hundreds: Division of 3-digit hundreds multiples 100 Divide a hundred 90 and 80 101 Divide ten thousand 30 000 / 50 = ? 102 Divide a hundred thousand 280 000 / 40 = ? 103 Divide a hundred thousand 640 000 / 8000 = ? 104 Degrees of heat: How many times hotter is the Earth's inner core than the upper mantle? 105 Rolling rivers: Compare the length of the Nile with the length of the Murrumbidgee 106 Go green: Average number of trees planted per week 107 Pay up!: Calculate fortnightly pay from annual salary 108 Plant division: Average monthly turnover 109 My Fair Sharer: Outputs (/ -9) 110 My Fair Sharer: Write the correct division setting 111 Divide and rule: Use halving to simplify division 112 Divide and rule: Use halving to simplify division 113 Divide and rule: Use halving to simplify division 114 True or false: -36 / -6 = -6 115 True or false: -72 / -9 = 8 116 True or false: 7 = -84 / -12 117 True or false: -96 / 12 = -24 / 3 118 Ahoy there, me hearties!: Money division 119 Cockroach count: Money division 120 My fair sharer: / -9 121 My fair sharer: / -12 122 Divide and rule: Simply division calculations by halving 123 Divide and rule: Simply division calculations by halving 124 Divide and rule: Simply division calculations by halving 125 Divide and rule: Simply division calculations by halving 126 Divide and rule: Simply division calculations by halving 127 True or False: -21/-7=3 128 True or False: -156/-12=13 129 True or False: -96/12=-8 130 True or False: -72/8=9 131 True or False: -45/-5=-9 132 Slam Dunk: Measurement mtuliplication 133 Surf's up: Money division 134 My Fair Sharer /-7 135 My Fair Sharer /-4 136 Divide and Rule: Simplify division by halving both numbers 137 Divide and Rule: Simplify division by halving both numbers 138 Divide and Rule: Simplify division by halving both numbers 139 Divide and Rule: Simplify division by halving both numbers 140 Divide and Rule: Simplify division by halving both numbers 141 Around the World in 8 days: Calculate price of fuel 142 Detective Duck finds the mystery suspect: Understand division terminology 143 Find the Mystery Number: Solve division sentences with a symbol for an unknown number 144 Find the Mystery Number: Solve division sentences with a symbol for an unknown number 145 Divide Ten Thousand 42600/300=* 146 Divide Ten Thousand 39 200/700=* 147 My Fair Sharer: Write correct division setting 148 Circular Logic: How many arc-seconds in a circle? 149 Enid the Elephant's Equations - 15/3 150 Four Force - complete number sentences 151 Happy Birthday 4 - hours in 11 years and 6 months 152 Aged to Perfection 4 - year 131 500 hours after 1991 153 Leap Years - select leap years from list 154 It's A Dog's Life 3 - sevenths of a year, "dog years" vs "human years" 155 Wait a Moment 1 - medieval time units, points and moments 156 The Traditions of Time 1 - quadrennium, quinquennium and octennium 157 It's A Dog's Life 2 - sevenths of a year, "dog years" vs "human years" 158 It's A Dog's Life 1 - sevenths of a year, "dog years" vs "human years" 159 It's A Dog's Life 4 - sevenths of a year, "dog years" vs "human years" 160 Lunar Ticks 4 - Callipic cycles, Metatonic cycles and years 161 The Way Things Used To Be 1 - Hebrew time units, heleks 162 Wait a Moment 3 - medieval time units, ounces and moments 163 Wait a Moment 2 - medieval time units, ounces and moments 164 The Traditions of Time 3 - quadrennium, quinquennium and octennium 165 The Way Things Used To Be 2 - Hebrew time units, heleks 166 Wait a Moment 4 - medieval time units, ounces and moments 167 The Great Paschal Period - solar and lunar cycles 168 The Traditions of Time 2 - quadrennium, quinquennium and octennium 169 Wal's Water Worries - 2.5L bottles in 80L barrel 170 Wal's Water Worries - 1.25L bottles in 10L barrel 171 Talking Maths - time to fill bath, 2 measures of L/min 172 Melted Maths - (tablespoons) 20mL to make 140mL