Question

333*66.6+778*99.9的简便运算

Answer 1

333*66.6+778*99.9=222*99.9+778*99.9=99.9*（222+778）=99.9*1000=9990

Answer 2

333*66.6+778*99.9=333*2*33.3+778*3*33.3=(666+2334)*33.3=3000*33.3=99900

Answer 3

333*66.6+778*99.9
=333*(3*22.2)+778*99.9
=999*22.2+77.8*999
=999*(22.2+77.8)
=999*100
=99900

Answer 4

333×66.6 + 778× 99.9 = 3×111×11.1×2×3 + 778× 11.1×9 = 9×111×11.1×2 + 778× 11.1×9=9×11.1×（111×2 + 778）= 99.9 ×1000=9990