小学五年级上册数学整数简便运算
2个回答
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300÷125÷8
=300÷(125×8)
=300÷1000
=0.3
396-96-172-28
=(396-96)-(172+28)
= 300-200
= 100 125×24
= 125×8×3
= 1000×3
= 3000
26×15
= (20+6)×15
= 20×15 + 6×15
= 300+90
=390
25×99×4
= 25×4×99
= 100×99
= 9900
250×32
= 250×4×8
= 1000×8
= 8000
(98+98+98+98)×25
= 4×98×25
= 4×25×98
= 100×98
= 9800
=300÷(125×8)
=300÷1000
=0.3
396-96-172-28
=(396-96)-(172+28)
= 300-200
= 100 125×24
= 125×8×3
= 1000×3
= 3000
26×15
= (20+6)×15
= 20×15 + 6×15
= 300+90
=390
25×99×4
= 25×4×99
= 100×99
= 9900
250×32
= 250×4×8
= 1000×8
= 8000
(98+98+98+98)×25
= 4×98×25
= 4×25×98
= 100×98
= 9800
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