递等式计算,能简算的用简便方法算: 8.46-8.46÷4+4.985 43.56÷12.5 6.4×3
递等式计算,能简算的用简便方法算:8.46-8.46÷4+4.98543.56÷12.56.4×3.28+4.6×3.28-3.2899.9×10.1....
递等式计算,能简算的用简便方法算: 8.46-8.46÷4+4.985 43.56÷12.5 6.4×3.28+4.6×3.28-3.28 99.9×10.1.
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(1)8.46-8.46÷4+4.985, =8.46-2.115+4.985, =8.46+(4.985-2.115), =8.46+2.87, =11.33; (2)43.56÷12.5=3.4848; (3)6.4×3.28+4.6×3.28-3.28, =(6.4+4.6-1)×3.28, =10×3.28, =32.8; (4)99.9×10.1, =99.9×(10+0.1), =999+9.99, =1000-1+9.99, =1000+8.99, =1008.99. |
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