1 − (2 × 10 + 8 × 5) = -59
95 eight 10's (80) three5s (15) 80 plus 15 is 95
If you cannot do this sum in your head, you should try using a calculator. The answer is 12.
The sum of -1 and -1 is -2.
25 tens, or 250
10 + 3*5 = 10+15 = 25
8 (sum means add 2x10 +10x2 =40 then divide by 5 to find the amount of fives that fit=8)
95 eight 10's (80) three5s (15) 80 plus 15 is 95
It is: -12+38 = 26
If you cannot do this sum in your head, you should try using a calculator. The answer is 12.
40
9218 9425
6
The sum of -1 and -1 is -2.
25 tens, or 250
A minus plus a minus will give a sum with a minus also.
10 + 3*5 = 10+15 = 25
The sum of twenty-five and fifteen = 25 + 15 = 40