脱式计算,能用简便方法计算的要用简便方法计算.
62×7.1+2.9
4.2×0.25
5.2×4.3+0.8×4.3
8.5+1.5÷0.25×4.
0.25×0.8+2.5%
9.6-11÷7+17*4
32×125×2.5
13÷0.4÷2.5
1.25×2.5×0.8
1.5×101-1.5
4.8×101.
3.25×4.7-7.8
0.57+0.43×0.24.
33.02-(148.4-90.85)÷2.5.
945÷5÷3
152×3÷2
43×12×6.
200+25×33
(25+26)×48.
672÷(2×3) 576÷3÷4.
35+360÷45)×2003 9975-1740÷145.
224÷56+256 203×(86-16)