Question

28×7×25+12×7×25+7×11×3+44等于多少简便运算？

Answer 1

最主要就是合并同类项7×25，步骤写的很详细哈，你可以自己删减或者改动。
也就是（7×25）×（28+12）+7×11×3+4×11
=7×25×40+7×11×3+4×11
=25×7×40+（21+4）×11
=25×（280+11）
=25×299
=25×300-25
=7500-25
=7475

Answer 2

28×7×25+12×7×25+7×11×3+44
=7×25x(28+12)+7×11×3+11x4
=7×25x40+11x(21+4)
=7×25x40+11x25
=7x1000 +10x25 +25
=7000+250+25
=7275

Answer 3

28×7×25+12×7×25+7×11×3+44
=25×7x（28+12）+7×11×3+44
=（40×25+11×3）×7+44
=1033×7+44
=7275

Answer 4

原式=7×(28×25+12×25+11×3)+44
=7×(700+300+33)+44
=7×1033+44
=7231+44
=7275.

Answer 5

先提取公因数
28*7*25+12*7*25+7*11+44
=7*25*（28+12）+7*11*3+44
=7*25*40+7*11*3+4*11
=7*1000+（7*3+4）*11
=7000+25*11
=7275