计算下面各题,能简算的要简算.(1)10÷8+3.96×12.5%+2.04× 2 16 (2...
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时间:2024-11-07 04:45
(1)10÷8+3.96×12.5%+2.04× 2 16
=1.25+3.96×12.5%+2.04×0.125,
=0.125×10+3.96×0.125+2.04×0.125,
=(10+3.96+2.04)×0.125,
=16×0.125,
=2;
(2)6000-105×36
=6000-(100+5)×36,
=6000-100×36-36×5,
=6000-3600-180,
=2220;
(3)85-84 7 8 ÷7
=85-(84+ 7 8 )÷7,
=85-84÷7- 7 8 ÷ 7,
=85-12- 1 8 ,
=72 7 8 ;
(4) 4 15 ÷[( 4 7 + 4 21 )× 7 12 ]
= 4 15 ÷[ 4 7 × 7 12 + 4 21 × 7 12 ],
= 4 15 ÷[ 1 3 + 1 9 ],
= 4 15 × 9 4 ,
= 3 5 ;
(5) 1 6 7 ×3.6+3 3 5 ×7 1 7 +3.6
=1 6 7 ×3.6+3.6×7 1 7 +3.6,
=(1 6 7 +7 1 7 +1)×3.6,
=10×3.6,
=36.