41 P4.WN.JM.17102199
Level 2
15 x 24 + 15 x 4 = 15 x 8 + _____ x 30
2 m
W 4 operations Distributive law of multiplication
42 P4.PA.JM.17092433
Level 3
What is 3 + 4 + 5 + 6 + ... + 47 + 48?
4 m
Rainbow method Sum of consecutive W 4 operations
43 P4.WN.JM.17102258
Level 2
Mrs Kang wanted to buy 300 badges. The badges were sold in boxes of 9. What was the minimum number of boxes of badges that Mrs Kang needed to buy?
2 m
W 4 operations W Remainder Min-max
44 P4.WN.NK.23010622
Level 2
5 trees are being planted at equal intervals on a road side of 20 m. If the trees are planted at both ends of the road, what is the distance between each tree?
2 m
W 4 operations Length Intervals
45 P4.WN.NK.23010623
Level 2
Mrs Ling planted 6 trees in a row. Each tree is 2 m away from the other. What is the distance between the first and the last tree?
2 m
W 4 operations Length Intervals
46 P4.WN.JM.17102200
Level 2
If you multiply a number by 8, then add 13, then subtract 9, you will get 100. What is the number?
2 m
W 4 operations Working backwards
47 P4.PA.JM.17092419
Level 3
Some tables and chairs are arranged as shown.
  1. How many chairs are there in Figure 7?
  2. How many tables are needed for 48 chairs?
5 m
Equal intervals W 4 operations
48 P4.PA.JM.17092418
Level 3
Sticks are used to make the figures as shown.
  1. How many sticks are used to make Figure 6?
  2. Which figure requires the use of 148 sticks?
5 m
Equal intervals W 4 operations
49 P4.WN.JM.17102183
Level 2
Xiaoping has 9 boxes of beads. In each box, there are 47 beads. If she gives 298 beads to her sister, how many beads will she have left?
3 m
W 4 operations Model Part-whole
50 P4.WN.JM.17102185
Level 2
Jenny wanted to invite 463 guests to her wedding. Each of her 7 friends helped her to make 23 invitation cards. She made the rest of the cards herself.
  1. How many cards did Jenny's friends help her make?
  2. Assuming that Jenny needed a card for each guest, how many more cards did Jenny have to make by herself?
3 m
W 4 operations Model Part-whole

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