计算下列各题(能简算的写出简算过程) 1 8 + 5 7 +6.875+ 2 7 7
计算下列各题(能简算的写出简算过程)18+57+6.875+2779÷115+29×51113÷(23-25)×354.82-5.2÷0.8×0.6....
计算下列各题(能简算的写出简算过程) 1 8 + 5 7 +6.875+ 2 7 7 9 ÷ 11 5 + 2 9 × 5 11 1 3 ÷( 2 3 - 2 5 )× 3 5 4.82-5.2÷0.8×0.6.
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(1) + + 6.875+ , = + + 6 + , =( + 6 )+( + ), =7+1, =8;
(2) ÷ + × , = × + × , = ×( + ), = × 1, = ;
(3) ÷ ( - )× , = ÷ ( - )× , = ÷ × , = × × , = ;
(4)4.82-5.2÷0.8×0.6, =4.82-6.5×0.6, =4.82-3.9, =0.92. |
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