Mental Math
4 + 4 + 4
12
321 + 123
444
321 - 120
201
15 x 2
30
20 markers are tied equally into 2 bundles. How many markers are there in each bundle.
20 ÷ 2 = 10
10 x 10 + 1
100 +1 = 101
456 + 345
801
456 - 321
135
50 ÷ 2
25
David has 18 toy cars and wants to put 2 toy cars in each box, how many boxes does he need?
18 ÷ 2 = 9
5 x 5 + 25
25 + 25 = 50
513 + ? = 899
386
987 - 678
309
60 ÷ ? = 5
12
Ella has 241 chocolate cakes. Jeff has 56 more chocolates than Ella. How many chocolate cakes does Jeff have?
241+56 = 297
10 x 10 + 5 + 10
? + 567 = 890
323
899 - ? = 513
386
27 x 2
20 x 2 + 7 x 2 = 40 + 14 = 54
May bakes 20 muffins. She divides the muffins equally among 4 children. How many muffins does each child get?
20 ÷ 4 = 5
5 x 5 + 50 + 15
25 + 65 = 90
569 + ? = 1000
431
900 - ? = 567
333
27 x 5
10 x 5 + 10 x 5 + 7x5
= 50 + 50 + 35
= 135
Mark has 378 marbles. He gave 59 marbles to Ally and lost 32 marbles. How many marbles had he left?
378 - 59 -32 = 287