计算,能简算的要简算. 64×7.6 5.68×7.5 184.6÷2.8 0.8×(1.25+50) 47.6÷4÷2.5 36.45
计算,能简算的要简算.64×7.65.68×7.5184.6÷2.80.8×(1.25+50)47.6÷4÷2.536.45÷(0.82+3.4×0.2)4.3×68+4...
计算,能简算的要简算. 64×7.6 5.68×7.5 184.6÷2.8 0.8×(1.25+50) 47.6÷4÷2.5 36.45÷(0.82+3.4×0.2) 4.3×68+43×3.2 6.75÷[0.9÷(0.3×0.4)] 3.72×0.1+3.72×8.9.
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(1)6.4×7.6=48.64; (2)5.68×7.5=42.6; (3)184.6÷2.8=
(4)0.8×(1.25+50), =0.8×1.25+0.8×50, =1+40, =41; (5)47.6÷4÷2.5, =47.6÷(4×2.5), =47.6÷10, =4.76; (6)36.45÷(0.82+3.4×0.2), =36.45÷(0.82+0.68), =36.45÷1.5, =24.3; (7)4.3×68+43×3.2, =43×6.8+43×3.2, =43×(6.8+3.2), =43×10, =430; (8)6.75÷[0.9÷(0.3×0.4)], =6.75÷[0.9÷0.12], =6.75÷7.5, =0.9; (9)3.72×0.1+3.72×8.9, =3.72×(0.1+8.9), =3.72×9, =33.48. |
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