Rounding by Compatible Numbers

Estimate by using compatible numbers .

$$5,568\div78=$$

(a)  

Round to the highest place value or use the most compatible numbers to estimate. $$879\div12=$$

(a)  

Estimate with compatible numbers.

$$3099\div77=$$

(a)  

Estimate 53.87 - 3.56 by rounding with compatible numbers.

CHALLENGE QUESTION

Estimate 29.34 x 2.843 by rounding with compatible numbers.

Estimate 30.8 divided by 4.96 by rounding with compatible numbers.

Which is the best estimate of 104 × 7 by using rounding or compatible numbers?

Which is the BEST estimate of 6 × 22 by using rounding or compatible numbers?

Which is the best estimate of 23 × 52 by using rounding or compatible numbers?