直接写数对又快1÷23×32=4×0.8×2.5×12.5=112×(24-445)÷2.4=6710×121+444÷4099+67×21.2=13419+861519×0.25+0.625×861519×0.125=-数学
题文
直接写数对又快 1÷
4×0.8×2.5×12.5= 112×(24-4
6
13
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答案
(1)1÷
=
=
(2)4×0.8×2.5×12.5, =(4×2.5)×(0.8×12.5), =10×10, =100; (3)112×(24-4
=112×
=112×(
=112×8, =896; (4)6
=6.7×121+67×21.2+444×
=67×12.1+67×21.2+444× |