Question

Use rounding to the nearest whole number and clustering to give an estimate for: 15.23 + 12.8 + 4.93 + 7.21.
A. 42
B. 41
C. 40 Use rounding to the nearest whole number and clustering to give an estimate for: 15.23 + 12.8 + 4.93 + 7.21.
A. 42
B. 41
C. 40 @Mathematics

Answer 1

15+13+5+7=???

Answer 2

...40

Answer 3

tell me how ?

Answer 4

it say round to the nearest whole number, so
15.23 rounds to 15
12.8 rounds to 13
4.93 round to 5
7.21 rounds to 7
to round, look at the number just after the place you're rounding to (in this case, the first number after the decimal). If the number is 5 or greater we round up, otherwise we round down.
15.23 rounds to 15
b/c 2<5
12.8 rounds to 13
b/c 8>5
4.93 round to 5
b/c 9>5
7.21 rounds to 7
b/c 2<5

Answer 5

ok thanks