Boris used mental math to make a ten to add 528+133
.
Drag the numbers to complete Boris' work. Numbers may be used once or more than once.
(2 points)
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133=2+31+100
528+
=530
+ 31=
561+
Response area =
Response area
So, 528+133=
Response area
133=2+31+100
528+=530
+31=
561+
So, 528+133=
561
Boris used mental math to make a ten to add 528+133.
Here is Boris' work:
133 = 2 + 31 + 100
528 +
= 530
+ 31 = 561
So, 528 + 133 = 561.