用简便方法计算能简便的就简便3.3×3.5×0.8
递等式计算:(能用简便方法计算的要用简便方法计算)0.11×1.8+8.2×0.110.8×(3.2-2.99÷2.3)3.5-3.5×0.9812.5×2.5×3.2(...
递等式计算:(能用简便方法计算的要用简便方法计算) 0.11×1.8+8.2×0.11 0.8×(3.2-2.99÷2.3) 3.5-3.5×0.98 12.5×2.5×3.2 (8.1-5.4)÷3.6+85.7.
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(1)0.11×1.8+8.2×0.11, =0.11×(1.8+8.2), =0.11×10, =1.1; (2)0.8×(3.2-2.99÷2.3), =0.8×(3.2-1.3), =0.8×1.9, =1.52; (3)3.5-3.5×0.98, =(1-0.98)×3.5, =0.02×3.5, =0.07; (4)12.5×2.5×3.2, =12.5×2.5×4×0.8, =12.5×0.8×(2.5×4), =10×10, =100; (5)(8.1-5.4)÷3.6+85.7, =2.7÷3.6+85.7, =0.75+85.7, =86.45.
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