简便 49.5/9+35.1/7.8 {2.5-8分之31/(6分之11+0.75)}*17分之30 19.63*99+19.63 (7.6-105*0.6)*13分10
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/29 22:35:40
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简便 49.5/9+35.1/7.8 {2.5-8分之31/(6分之11+0.75)}*17分之30 19.63*99+19.63 (7.6-105*0.6)*13分10
简便 49.5/9+35.1/7.8 {2.5-8分之31/(6分之11+0.75)}*17分之30 19.63*99+19.63 (7.6-105*0.6)*13分10
简便 49.5/9+35.1/7.8 {2.5-8分之31/(6分之11+0.75)}*17分之30 19.63*99+19.63 (7.6-105*0.6)*13分10
49.5/9+35.1/7.8
=5.5+4.5
=10
{2.5-8分之31/(6分之11+0.75)}*17分之30
={2.5-31/8÷31/12}×30/17
={2.5-1.5}×30/17
=30/17
19.63*99+19.63
=19.63×(99+1)
=19.63×100
=1963
(76-105*0.6)*13分10
=(76-63)×10/13
=13×10/10
=10
49.5/9+35.1/7.8
=5.5+4.5
=10
{2.5-8分之31/(6分之11+0.75)}*17分之30
={2.5-31/8÷31/12}×30/17
={2.5-1.5}×30/17
=30/17
19.63*99+19.63
=19.63×(99+1)
=19.63×100
=1963
(76-105*0.6)*13分10
=(76-63)×10/13
=13×10/10
=10
7.8乘以9+7.8简便方法
7.8*9+7.8简便拖式
简便 49.5/9+35.1/7.8 {2.5-8分之31/(6分之11+0.75)}*17分之30 19.63*99+19.63 (7.6-105*0.6)*13分10
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