脱式计算,怎样简便就怎样算:0.8×4×2.5×12.5 &...

脱式计算,怎样简便就怎样算:0.8×4×2.5×12.5 4.3×7+4.3×2+4.3.
2024-12-02 12:47:30
推荐回答(1个)
回答1:

(1)0.8×4×2.5×12.5              
=(0.8×12.5)×(4×2.5)
=10×10
=100;
             
(2)4.3×7+4.3×2+4.3
=4.3×(7+2+1)
=4.3×10
=43.