Mental Math +
50 +25=
75
60- 10 =
50
11 X 9 =
99
400 ➗ 5
80
Round to the TEN
52
50
50 + 50 + 50 = The same as _____X_____
50x3
How many TENS are in..
784
8
100 + 900 =
1000
562-100
462
20x20
400
54 ➗ 6
9
Round to the TEN
93
90
40 + 40 + 40 + 40 = The same as _____X_____
40 x 4
How many ONES are in..
672
2
5 + 5 + 5 +5
20
649-349
300
700 x 2
1400
100 ➗ 4
25
Round to the TEN
16
20
60 + 60 = The same as _____X_____
60 x 2
How many HUNDREDS are in..
186
1
865 + 10
875
I baked 16 muffins. Martin ate half of them. How many are left?
8
50x3
150
500 ➗ 2
250
Round to the HUNDRED
168
200
150 + 150 + 150 = The same as _____X_____
150 x 3
How many TENS are in..
9,762
6
1048 + 200 =
1248
Jack had a lemonade stand and made $20, the first day and $30 the next day. He spent $10 the third day. How much does he have left?
$40
100x100
10,000
140 ➗ 10
14
Round to the HUNDRED
213
200
3000 + 3000 + 3000 + 3000 = The same as _____X_____
3000 x 4
How many THOUSANDS are in..
5,986
5