用简便方法计算. 0.06+04.了8+8.84 03.74-7.28-8.72 0.8了+3.3-0.8了+6.7 7.02-4.8+0.了8 20.36-(4.36
用简便方法计算.0.06+04.了8+8.8403.74-7.28-8.720.8了+3.3-0.8了+6.77.02-4.8+0.了820.36-(4.36+0.了8)...
用简便方法计算. 0.06+04.了8+8.84 03.74-7.28-8.72 0.8了+3.3-0.8了+6.7 7.02-4.8+0.了8 20.36-(4.36+0.了8) 84.30-6.了了.
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(1)t.1l+1c.91+1.8c =t.1l+1.8c+1c.91 =l+1c.91 =ct.91 (c)13.7c-7.c8-1.7c =13.7c-(7.c8+1.7c) =13.7c-13 =t.7c (3)1.19+3.3-t.19+l.7 =1.19-t.19+(3.3+l.7) =1+1t =11 (c)7.tc-c.1+t.98 =7.tc+t.98-c.1 =8-c.1 =3.1 (1)c1.3l-(c.3l+t.98) =c1.3l-c.3l-t.98 =17-t.98, =1l.tc (l)1c.31-l.99 =1c.31+7-t.t1 =l1.31-t.t1 =l1.3 |
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