1. Victorian Curriculum
  2. Mathematics
  3. Year 4
  4. Number and Algebra
  5. Patterns and algebra

VCMNA163

Use equivalent number sentences involving addition and subtraction to find unknown quantities

1. Adding tens: ?+ 36 = 66
2. Adding tens: ?+ 73 = 83
3. Adding tens: ?+ 46 = 86
4. Adding tens: 120 + ? = 140; 120 + 50 = ?
5. Adding tens: 24 + ? = 64, 24 + 50 = ?
6. Adding tens: 145 + ? = 155, 145 + 30 = ?
7. Adding tens: 57 + ? = 97, 57 + 20 = ?
8. Adding tens: 138 + ? = 178, 178 + 20 = ?
9. Use the pattern: 2+4, 12+4, 120 + 40
10. Use the pattern: 4+1, 14+1, 140+10
11. Use The Pattern: 4+3, 14+3, 140+30
12. Use The Pattern: 2+7, 12+7, 120+70
13. Use The Pattern: 5+4, 15+4, 150+40
14. Use The Pattern: 3+6, 13+6, 130+60
15. Use The Pattern: 5+3, 15+3, 150+30
16. Number detectives: 80+?, 90+?, 40+?=100
17. Number detectives: 10+?, 70+?, 50+?=100
18. Number detectives: 25+?, 35+?, 55+? =100
19. Number detectives: 5+?, 45+?, 15+?=100
20. 100 Zone: 93 + 10, 94 + 10, 96 + 10
21. 100 Zone: 90 + 10, 92 + 10, 97 + 10
22. 100 Zone: 95 + 10,10 + 95, 105 - 10
23. 100 Zone: 98 + 10,10 + 98, 108 - 10
24. 100 Zone: 99 + 10,109 - 10, 10 + 99
25. 100 Zone: 70 + 40 = ? 90 + ? = 110, ? + 80 = 110
26. 100 Zone: 60 + 80 = ? 90 + ? = 140, ? + 100 = 140
27. 100 Zone: 70 + 80 = ? 100 + ? = 150, ? + 70 = 150
28. 100 Zone: 90 + 70 = ? 80 + ? = 160, ? + 60 = 160
29. Number detectives 235+6 = *
30. Number detectives 98+7=*
31. Number detectives 485+*= 493
32. Number detectives 515+*= 523
33. Number Detectives: 100 Pairs ? + 79 = 100
34. Number Detectives: 100 Pairs ? + 51 = 100
35. Number Detectives: 100 Pairs 63 + 37 = ?
36. Number Detectives: 100 Pairs 88 + ? = 100
37. Use the pattern: 6+3, 60+30, 600+300
38. Use the pattern: 2+4, 20+40, 200+400
39. Use the pattern: 2+6, 20+60, 200+600
40. Use the pattern: 4+9, 40+90, 400+900
41. Use the pattern: 1+7, 10+70, 100+700
42. Add Hundreds: 600+ * = 946
43. Add Hundreds: 200+ * = 580
44. Add Hundreds: 400+ * = 963
45. Add Hundreds: 100+ * = 319
46. Add Hundreds: 300+ * = 565
47. Adding Tens: 416 + 50 = *
48. Adding Tens: 542 + 50 = *
49. Add Hundreds: 500+246
50. Add Hundreds: 100+280
51. Add Hundreds: 300+453
52. Add Hundreds: 200+43
53. Add Hundreds: 800+163
54. Adding Tens: * + 726 = 786
55. Adding Tens: * + 314 = 394
56. Add Hundreds: * + 300 = 330
57. Add Hundreds: * + 200 = 241
58. Add Hundreds: * + 800 = 819
59. Add Hundreds: * + 300 = 345
60. Add Hundreds: * + 200 = 295
61. Number Detectives: 100 Pairs 85 + ?, 75 + ?, 45 +?= 100
62. Mystery number: ?+7=252
63. Mystery number: ?+6=174
64. Mystery number: ?+7=451
65. Mystery number: ?+6+163
66. Mystery number: 106+11=?
67. Mystery number: 514+12=?
68. Mystery number: 913+13=?
69. Mystery number: 711+17=?
70. Mystery number: 133+16=?
71. Use the pattern: 5+2,50+20, 500+200=?
72. Use the pattern: 5+4,50+40, 500+400=?
73. Use the pattern: 7+1,70+10, 700+100=?
74. Use the pattern: 2+3,20+30, 200+300=?
75. Use the pattern: 3+8,30+80, 300+800=?
76. Adding Tens: 235+50 =?
77. Adding Tens: 338+50=?
78. Adding Tens: 562+30=?
79. Adding Tens: ?+30=492
80. Mysteries of 30!: 20+?, 15+?, 5+?
81. Mysteries of 30!: 19+?, 10+?, 16+?
82. Mysteries of 30!: 12+?, 13+?, 14+?
83. Mysteries of 30!: 9+?, 5+?, 7+?
84. Mysteries of 30!: 26+?, 28+?, 22+?
85. Complem. add/subtract: 136+419=555
86. Complem. add/subtract: 216+84=300
87. Complem. add/subtract: 112+32=144
88. Complem. add/subtract: 125+14=139
89. Complem. add/subtract: 105+24=129
90. Complem. add/subtract: 210+14=224
91. Number detectives: 65+?, 55+?, 85+?=100
92. Taking Tens: 90 - ? = 70
93. Use the pattern: 9-8, 90-80, 900-800
94. Use the pattern: 5-3, 50-30, 500-300
95. Use the pattern: 8-2, 80-20, 800-200
96. Use the Pattern: 7-3, 37-3, 167-3=?
97. Use the Pattern: 9-5, 29-5, 249-5=?
98. Use the Pattern: 6-3, 36-3, 166-3=?
99. Use the Pattern: 8-1, 18-1, 128-1=?
100. Use the Pattern: 6-4, 46-4, 286-4=?
101. Subtracting tens: 86 - ? = 56
102. Subtracting tens: 94 - ? = 24
103. The Mysteries of 40!: 40-?=32, 40-?=29, 40-?=37
104. The Mysteries of 40!: 40-?=29, 40-?=38, 40-?=39
105. The Mysteries of 40!: 40-?=30, 40-?=33, 40-?=36
106. The Mysteries of 30!: 30-?=26, 30-?=23, 30-?=27
107. The Mysteries of 30!: 30-?=23, 30-?=13, 30-?=3
108. The Mysteries of 30!: 30-?=18, 30-?=15, 30-?=12
109. The Mysteries of 30!: 30-?=14, 30-?=19, 30-?=9
110. Subtraction chains: 30-4-10-8, 30-5-10-7
111. Subtraction chains: 30-4-16-8, 30-5-3-11
112. Subtraction chains: 30-8-6-12, 30-6-3-5
113. Subtraction chains: 30-3-4-13, 30-6-5-7
114. Subtraction chains: 30-10-9-4, 30-5-9-7
115. The Mysteries of 40! 40-14,23,19
116. The Mysteries of 40! 40-8,12,25
117. The Mysteries of 40! 40-20,15,9
118. The Mysteries of 50! 50-35,12,6
119. The Mysteries of 50! 50-16,21,30
120. Subtraction chains: ?-12-7-6=65, ?-11-6-13=50
121. Subtraction chains: ?-11-10-12, ?-8-11-4=7
122. Subtraction chains: ?-10-11-9, 50-12-8-7=23
123. Subtraction chains: ?-11-8-10, ?-9-6-7=34
124. Subtraction chains: ?-7-9-12, ?-12-5-11
125. Take Tens: 67-?=47,430-70=?
126. Take Tens: 71-?=21,250-30=?
127. Take Tens: 66-?=36,360-80=?
128. Take Tens: 94-?=54,740-20=?
129. Take Tens: 89-?=19,460-50=?
130. Take Tens: 86-?=26,170-40=?
131. Take it away 352-18=334
132. Take it away 472-46=426
133. Hundreds Takeaway: 6*2-32* = *21
134. Hundreds Takeaway: **2-43*=362
135. Hundreds Takeaway: *1*-5*4=414
136. Hundreds Takeaway: *8*-2*2=132
137. What Was I Thinking? - find original number after operations
138. What Was I Thinking? - find original number after operations
139. What Was I Thinking? - find original number after operations
140. All Things Equal - equivalent to 7 + 7
141. Which Operation? - 60*4 = 56
142. Number Quest - complete number sentence
143. Number Quest - complete number sentence
144. Crossing 100: Add 70 to 60
145. Crossing 100: Add 60 to 80
146. Crossing 100: Add 90 to 40
147. Crossing 100: Add 50 to 90
148. Crossing 100: Add 50 to 70
149. Build A Total - number sequence, 25
150. Build A Total - number sequence, 35
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