29×25+87×25-116×15计算过程
脱式计算.(能简算的必须简算,要有主要简算过程)(29×154+135÷45)÷73184×0.25+14×15+25%18789-(15-1219)1847+6.25+...
脱式计算.(能简算的必须简算,要有主要简算过程) ( 2 9 × 15 4 + 13 5 ÷ 4 5 )÷ 7 3 184×0.25+ 1 4 ×15+25% 187 8 9 -(15-12 1 9 ) 18 4 7 +6.25+7 3 7 +3.75 2 3 ÷8+ 1 3 × 1 8 6.43×83.8÷6.43×6.43÷83.8÷6.43.
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(1)( 2 9 × 15 4 + 13 5 ÷ 4 5 )÷ 7 3 , =( 2 9 × 15 4 + 13 5 × 5 4 )÷ 7 3 , =( 5 6 + 13 4 )× 3 7 , = 49 12 × 3 7 , = 7 4 ; (2)184×0.25+ 1 4 ×15+25%, =184×0.25+0.25×15+0.25, =(184+15+1)×0.25, =200×0.25, =50; (3)187 8 9 -(15-12 1 9 ), =(187 8 9 +12 1 9 )-15, =200-15, =185; (4)18 4 7 +6.25+7 3 7 +3.75, =(18 4 7 +7 3 7 )+(3.75+6.25), =26+10, =36; (5) 2 3 ÷8+ 1 3 × 1 8 , = 2 3 × 1 8 + 1 3 × 1 8 , =( 2 3 + 1 3 )× 1 8 , =1× 1 8 , = 1 8 ; (6)6.43×83.8÷6.43×6.43÷83.8÷6.43, =(6.43÷6.43)×(83.8÷83.8)×(6.43÷6.43), =1×1×1, =1.
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