Question

28*5+2*4*35+21*20+14*40+8*62简便运算怎样算？

Answer 1

28*5+2*4*35+21*20+14*40+8*62
=7*20+28*20+21*20+8*35+8*62
=56*20+8*97
=8*140+8*97
=8x237
=1896

Answer 2

你好！
28x5+2x4x35+21x20+14x40+8x63的简便运算如下：
28x5+2x4x35+21x20+14x40+8x63

=4×7×5+2×4×5×7+3×7×20+2×7×40+8×7×9

=7×(4×5+2×4×5+3×20+2×40+8×9)

=7×(20+40+60+80+72)

=7×272

=1904