Question

3.21×8.2+87×8.18+0.82×54.9 递等式计算 我秒采纳

Answer 1

3.21×8.2+87×8.18+0.82×54.9
=3.21×8.2+8.2×5.49+87×8.18
=8.2×(3.21+5.49)+8.7×81.8
=8.2×8.7+8.7×81.8
=8.7×(8.2+81.8)
=8.7×90
=783

Answer 2

原题=3.21*8.2+8.2*5.49+87*8.18
=8.2*(3.21+5.49)+87*8.18
=8.2*8.7+8.7*81.8
=8.7(8.2+81.8)
=8.7*90
=783
希望我的回答能帮到你

Answer 3

3.21×8.2+87×8.18+0.82×54.9
=32.1x0.82+0.82x54.9+87x8.18
=(32.1+54.9)x0.82+87x8.18
=87x0.82+87x8.18
=87x(0.82+8.18)
=87x9
=87x10-87
=870-87
=783

Answer 4

原式=32.1×0.82+87×8.18＋0.82×54.9
=0.82×（32.1+54.9）+87×8.18
=0.82×87+87×8.18
=87×（0.82+8.18)
=87×9
=783

Answer 5

3.21*8.2+87*（8.2-0.02）+5.49*8.2
=3.21*8.2+87*8.2-87*0.02+5.49*8.2
=（3.21+87+5.49）*8.2-87*0.02
=（87+8.7）*8.2-87*0.02
=87*8.2+8.7*8.2-8.7*0.2
=87*8.2+8.7*（8.2-0.2）
=87*8.2+8.7*8
=87*（8.2+0.8）
=87*9
=783