Round each of the numbers then add the rounded numbers. 60+40=100.
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The idea is to round each of the numbers - in this case to the nearest multiple of 10 - then do the addition in your head.
43.
43 minus the sum of 16 and 11 can be calculated as follows: 16 + 11 = 27 43 - 27 = 16 Therefore, 43 minus the sum of 16 and 11 is equal to 16.
The two numbers with the sum of 15 and the product of 56 are: 7 + 8 = 15 7 x 8 = 56
43 is the sum of the two consecutive integers 21 and 22.