1. NSW Syllabus
  2. Maths
  3. Stage 3
  4. Numbers and Algebra
  5. Addition and Subtraction
  6. MA3-5NA
  7. Addition and Subtraction 1
  8. Use efficient mental and written strategies and apply appropriate digital technologies to solve problems (ACMNA291)

Check solutions to problems, including by using the inverse operation

1. Make 400: 200+100+?
2. Make 500: 100+200+?
3. Make 600: 50+550+?
4. Make 700: 350+125+?
5. Make 800: 125+225+?
6. Make 900: 275+375+?
7. On the Board: *24 + 92= 6**
8. On the Board: **1 + 38= 30*
9. On the Board: *4*+*6=569
10. On the Board: 81*+*6=*09
11. On the Board: 7**+102=*97
12. On the Board: 53*+*2=*29
13. On the Board: 6*+*2=100
14. On the Board: *6+2*=100
15. On the Board: 4*+*7=100
16. Hundreds and hundreds: 657+173=830
17. Hundreds and hundreds: ?64+5?9=90?
18. Hundreds and hundreds: 6?8+157=?2?
19. Hundreds and hundreds: 364+235=?
20. Make 1000: 500+300+?
21. Make 1000: 600+300+?
22. Make 1000: 400+100+?
23. Make 1000: 400+200+?
24. Make 1000: 200+100+?
25. Make 1000: 250+300+*
26. Make 1000: 750+50+*
27. Make 1000: 850+150+*
28. Make 1000: 600+150+*
29. Make 1000: 50+800+*
30. Hundreds and hundreds: 597+600=?
31. Hundreds and hundreds: Complete vertical hundreds addition
32. Hundreds and hundreds: Complete vertical hundreds addition
33. Hundreds and hundreds: 643+600=?
34. Hundreds and hundreds: 756+800=?
35. Number Detectives: Mystery Teens
36. 100 Zone: 180+30, 270+50, 40+330
37. 100 Zone: 568+30, 623+20, 60+480
38. 100 Zone: 372+20, 638+50, 110+40
39. 100 Zone: 263+20, 390+30, 70+680
40. 100 Zone: 890+50, 329+30, 50+440
41. Add board: 140*+8*0=*229
42. Add board: 183*+3*0=2*60
43. Add board: *7*0+458=2*5*
44. Add board: 15*5+60*=2*55
45. Add board: 1*88+4*0=*10*
46. Add Board: Complete vertical algorithm
47. Add Board: Complete vertical algorithm
48. Add Board: Complete vertical algorithm
49. Add Board: Complete vertical algorithm
50. Add Board: Complete vertical algorithm
51. Hundreds and Hundreds: Complete vertical algorithm
52. Hundreds and Hundreds: Complete vertical algorithm
53. Hundreds and Hundreds: Complete vertical algorithm
54. Hundreds and Hundreds: Complete vertical algorithm
55. Hundreds and Hundreds: Complete vertical algorithm
56. Thousands and Thousands: Complete vertical algorithm
57. Thousands and Thousands: Complete vertical algorithm
58. Thousands and Thousands: Complete vertical algorithm
59. Thousands and Thousands: Complete vertical algorithm
60. Thousands and Thousands: Complete vertical algorithm
61. Scoring Decimal Points: Complete vertical algorithm
62. Adding decimals: Write missing numbers in vertical addition of 2-digit numbers with 1 dp
63. Adding decimals: Write missing numbers in vertical addition of 2-digit numbers with 1 dp
64. Adding decimals: Write missing numbers in vertical addition of 2-digit numbers with 1 dp
65. Scoring Decimal Points: 2*.*+14.9 = *8.5
66. Scoring Decimal Points: *2.4* + 9.*0 = 4*.09
67. Scoring Decimal Points: *4.34 + 7*.0* = 93.*1
68. Scoring Decimal Points: 7.5* + *.*0 = *2.46
69. Scoring Decimal Points: 4.*6 + 3.1* = *.08
70. Scoring Decimal Points: 8.6* + *.91 = 11.*3
71. Scoring Decimal Points: 7.4* + *.68 = 11.*1
72. Scoring Decimal Points: *.16 + 7.9* = 10.*1
73. Scoring Decimal Points: 4.61 + 6.*3 = **.4*
74. Scoring decimal points: Write the missing numbers in vertical decimal addition
75. Scoring decimal points: Write the missing numbers in vertical decimal addition
76. Scoring decimal points: Write the missing numbers in vertical decimal addition
77. Scoring decimal points: Write the missing numbers in vertical decimal addition
78. Scoring decimal points: Write the missing numbers in vertical decimal addition
79. Write the missing number: 15 + 110 + ? = 134
80. Write the missing number: 18 + 111 + ? = 131
81. Write the missing number: ? + 104 + 15 = 126
82. Write the missing number: 110 + ? + 107 = 229
83. Write the missing number: 109 + ? + 115 = 330
84. Write the missing number: 21 + 107 + ? = 137
85. Write the missing number: 125 + ? + 5 = 142
86. Write the missing number: 118 + ? + 20 = 145
87. Write the missing number: 13 + ? + 126 = 148
88. Write the missing number: 14 + 117 + ? = 139
89. Hundreds takeaway: *53-*7=61*
90. Hundreds takeaway: *42 - 5*9 = 31*
91. Hundreds takeaway: *75 - 2*6 = 10*
92. Hundreds takeaway: *43 - 2*7 = 20*
93. Hundreds takeaway: *82-4*7 = 18*
94. Hundreds Takeaway: *00 - 37 = 66*
95. Hundreds Takeaway: *00 - *8 = 352
96. Hundreds Takeaway: 800 - **5 = 45
97. Hundreds Takeaway: *00 - 569 = *1
98. Hundreds Takeaway: *00-26*=35
99. Write the missing number: 750+100+?=1000
100. Write the missing number: 600+50+?=1000
101. Write the missing number: 500+450+?=1000
102. Write the missing number: 250+50+?=1000
103. Write the missing number: 650+100+?=1000
104. Hundreds Takeaway: 777 - 699 = *78
105. Hundreds Takeaway: 658 - *79 = 1*9
106. Hundreds Takeaway: 9*1 - *52 = 1*9
107. Hundreds Takeaway: 792 -*6* = 5*8
108. Hundreds Takeaway: **1 - 21* = 185
109. Hundreds and Thousands: *5** - *90=1890
110. Thousands Takeaway: 61*8 - 4*2* =*219
111. Thousands Takeaway: *47* - 2859 = 5**4
112. Hundreds and Thousands: *782 - *3* = 18*6
113. Thousands Takeaway: Complete vertical algorithm
114. Thousands Takeaway: Complete vertical algorithm
115. Thousands Takeaway: Complete vertical algorithm
116. Thousands Takeaway: Complete vertical algorithm
117. Thousands Takeaway: Complete vertical algorithm
118. Thousands Takeaway: Complete vertical algorithm
119. Thousands Takeaway: Complete vertical algorithm
120. Thousands Takeaway: Complete vertical algorithm
121. Thousands Takeaway: Complete vertical algorithm
122. Scoring Decimal Points: Complete vertical algorithm
123. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
124. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
125. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
126. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
127. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
128. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
129. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
130. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
131. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
132. Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers
133. Decimal Drops: Write the missing numbers in vertical decimal subtractions
134. Decimal Drops: Write the missing numbers in vertical decimal subtractions
135. Decimal Drops: Write the missing numbers in vertical decimal subtractions
136. Decimal Drops: Write the missing numbers in vertical decimal subtractions
137. Decimal Drops: Write the missing numbers in vertical decimal subtractions
138. Scoring decimal points: Write missing numbers in vertical decimal subtractions
139. Scoring decimal points: Write missing numbers in vertical decimal subtractions
140. Scoring decimal points: Write missing numbers in vertical decimal subtractions
141. Scoring decimal points: Write missing numbers in vertical decimal subtractions
142. Scoring decimal points: Write missing numbers in vertical decimal subtractions
143. Scoring decimal points: Write missing numbers in vertical subtractions
144. Scoring decimal points: Write missing numbers in vertical subtractions
145. Scoring decimal points: Write missing numbers in vertical subtractions
146. Scoring decimal points: Write missing numbers in vertical subtractions
147. Scoring decimal points: Write missing numbers in vertical subtractions
148. Scoring Decimal Points: Write missing numbers in vertical subtraction
149. Scoring Decimal Points: Write missing numbers in vertical subtraction
150. Scoring Decimal Points: Write missing numbers in vertical subtraction
151. Scoring Decimal Points: Write missing numbers in vertical subtraction
152. Scoring Decimal Points: Write missing numbers in vertical subtraction
153. Big Times: *1 x 5 = 105
154. Big Times: * 2 X 4 = 24*
155. Big Times: 74 X * = 148
156. Hit the Big times: *87 x 2 = 97*
157. Hit the Big times: *66 x * = 996
158. Hit the Big times: *19 x 3= 27**
159. Hitting The Big Times: Fill in the missing numbers in a vertical multiplication sum
160. Hitting The Big Times: Fill in the missing numbers in a vertical multiplication sum
161. My Fair Sharer - 6, 240, 90, 72
162. My Fair Sharer - 720, 88, 3, 60
163. Fair Sharer /4
164. Fair Sharer /6
165. Fair Sharer /9
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