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章节目录
计算:
1.73+21.7−11.4计算:
(1)
1.2×8.6(2)
1.125×8计算:
(1)
68.8÷4(2)
3.64÷1.4计算。
(1)
0.9+0.99+0.999+0.9999+0.99999(2)
0.7+9.7+99.7+999.7+9999.7计算。
(1)
90.3+88.8+90.2+91.2+179.1+270.4(2)
3.17+7.48+0.83−2.38−1.62−3.48计算。
(1)
0.125×0.25×0.5×64(2)
1.125×64×0.75先找到公因数,再计算。
(1)
2.5×1.06+2.5×0.84+2.5×2.1(2)
12.5×0.54+0.067×125−1.25×4.1计算:
3.79×0.38+1.59×6.21+3.79×1.21计算:
(0.1+0.21+0.321)×(0.21+0.321+0.4321)−(0.1+0.21+0.321+0.4321)×(0.21+0.321)练习
(6题)计算。
(1)
89+899+8999+89999+899999(2)
1.996+19.97+199.8计算:
35.6+35.02+34.81+35.08+35.11计算。
(1)
1.25×32×0.25(2)
2.5×4×125×1.6计算。
(1)
7.8×24+7.8×71+0.78×50(2)
0.13×21−0.13×19+0.13×57+1.3×4.1计算:
14.3×7.88−9.7×7.38+1.43×21.2−97×0.262计算:
(1+0.45+0.56)×(0.45+0.56+0.67)−(1+0.45+0.56+0.67)×(0.45+0.56)