2.16÷[64.8-(51.3-2.7)×3]
=2.16÷[21.6×3-48.6×3]
=2.16÷[3×﹙21.6-48.6﹚]
=2.16÷[3×﹙﹣27﹚]
=﹣2.16÷81
=﹣8/300
2.16÷[64.8-(51.3-2.7)×3]
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计算，能简算的要用简算．9-4.8÷6×0.52.16÷[64.8-（51.3-2.7×3]（1.4×0.3+2.46）00
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64+24÷8-2×3=67 64+24÷8-2×3=76 64+24÷8-2×3=27 填小括号00
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2/7÷1/7—1/5×1/3=?（3/4+3/7-1/2）÷1/28=?51×8/25-8/00
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看谁算得对． 2×6= 8÷4= 32+16= 27÷9= 7×4= 63÷7= 12÷3= 64÷8= 9×9= 3×00
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①3/4×7/8÷0.75 ②（2/5-3/8)×40 ③2/7-9/16×2/700
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算一算．7×8= 4×6= 64÷8= 45÷5= 9×3= 54÷6= 24÷3= 5×8= 2×7= 81÷9= 300
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怎样简便怎样计算．①1.25×[1/10]×8②51×3.2-51.2÷16③4.62-2.85+1.38④[3/25]00