Question

57 x (247 - 147) =
69 x 100 - (25 x 10) x 2 =
85 x 100 - (47 x 10 + 362) x 3 =
(572 + 45 x 100) - 36 x 10 =​

Answer 1

Răspuns:

1. 57 ×(247-147)=57×100=5700

69×100-(25×10)×2=6900-250×2=6900-125=6775

85×100-(47×10+362)×3=8500-(470+362)×3=8500-832×3=8500-2496=6004

(572+45×100)-36×10=(572+4500)-36×10=5072-360=4712

Answer 2

Răspuns:

57 x(247-147)=57x100=5700

69x100-(25x10)x2=6900-250x2=6900-500=6400

85x100-(47x10+362)x3=8500-(470+362)x3

=8500-832x3=8500-2496=6004

(572+45x100)-36x10=(572+4500)-360=5072-360

=4712