脱式计算.(1)7.85÷0.25×6.48 (2)6.7+19.34-3.63÷0.6(3)0.24×[151-(53.2-2.2)÷0.51](4)7.
脱式计算.(1)7.85÷0.25×6.48(2)6.7+19.34-3.63÷0.6(3)0.24×[151-(53.2-2.2)÷0.51](4)7.38÷[4.6+...
脱式计算.(1)7.85÷0.25×6.48 (2)6.7+19.34-3.63÷0.6(3)0.24×[151-(53.2-2.2)÷0.51](4)7.38÷[4.6+1.2×(7.1-4.1)].
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(1)7.85÷0.25×6.48, =31.4×6.48, =203.472; (2)6.7+19.34-3.63÷0.6, =6.7+19.34-6.05, =26.04-6.05, =19.99; (3)0.24×[151-(53.2-2.2)÷0.51], =0.24×[151-51÷0.51], =0.24×[151-100], =0.24×(50+1), =0.24×50+0.24×1, =12+0.24, =12.24; (4)7.38÷[4.6+1.2×(7.1-4.1)], =7.38÷[4.6+1.2×3], =7.38÷(4.6+3.6), =7.38÷8.2, =0.9. |
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