早教吧作业答案频道 -->其他-->
能用简便方法计算就用简便方法计算①6.9×3.6-4.84÷0.4②4.75+8.4÷(9.2-6.8)③1.2÷[2.5(4.3-2.7)]④4.5×(0.75-0.356)+9.23⑤0.88÷0.8+3.2×1.25⑥5.4+(0.63+0.555÷1.5)
题目详情
能用简便方法计算就用简便方法计算
①6.9×3.6-4.84÷0.4 | ②4.75+8.4÷(9.2-6.8) |
③1.2÷[2.5(4.3-2.7)] | ④4.5×(0.75-0.356)+9.23 |
⑤0.88÷0.8+3.2×1.25 | ⑥5.4+(0.63+0.555÷1.5) |
▼优质解答
答案和解析
①6.9×3.6-4.84÷0.4,
=24.84-12.1,
=12.74;
②4.75+8.4÷(9.2-6.8),
=4.75+8.4÷2.4,
=4.75+3.5,
=8.25;
③1.2÷[2.5×(4.3-2.7)],
=1.2÷[2.5×1.6],
=1.2÷4,
=0.3;
④4.5×(0.75-0.356)+9.23,
=4.5×0.394+9.23,
=1.773+9.23,
=11.003;
⑤0.88÷0.8+3.2×1.25,
=1.1+4×0.8×1.25,
=1.1+4×(0.8×1.25),
=1.1+4×1,
=1.1+4,
=5.1;
⑥5.4+(0.63+0.555÷1.5),
=5.4+(0.63+0.37),
=5.4+1,
=6.4.
=24.84-12.1,
=12.74;
②4.75+8.4÷(9.2-6.8),
=4.75+8.4÷2.4,
=4.75+3.5,
=8.25;
③1.2÷[2.5×(4.3-2.7)],
=1.2÷[2.5×1.6],
=1.2÷4,
=0.3;
④4.5×(0.75-0.356)+9.23,
=4.5×0.394+9.23,
=1.773+9.23,
=11.003;
⑤0.88÷0.8+3.2×1.25,
=1.1+4×0.8×1.25,
=1.1+4×(0.8×1.25),
=1.1+4×1,
=1.1+4,
=5.1;
⑥5.4+(0.63+0.555÷1.5),
=5.4+(0.63+0.37),
=5.4+1,
=6.4.
看了 能用简便方法计算就用简便方法...的网友还看了以下:
找出等量关系.并列方成解答.一个数减去6后,扩大7倍等于这个数的2倍,求这个数.已知△-□=2.8 2020-05-13 …
儿子不会的数学题?-*=2.8*+/=9.2?+/=??=几 *=几 /= 2020-05-16 …
帮我破解下这串数字什么意思9(2)4(3)6(2)2(1)4(3)3(1)4(3)9(1)6(3) 2020-05-17 …
知道的来回答,关于图形问题(不)已知△-□=2.8,□+○=9.2,△+○=△△△呢么△=()□= 2020-06-03 …
已知△-■=2.8,■+○=9.2,△+○=△+△+△那么△=(),■=(),○=() 2020-06-04 …
设f(x,y)在闭区间D={(x,y)|x2+y2≤y,x≥0}上连续,且f(x,y)=√(1-x 2020-06-12 …
动脑筋填空△-□=2.8,□+○=9.2,△+○=△+△+△△=(),○=(),□=() 2020-07-10 …
口算:5.6+3.4=10-2.7=2.8+3.3=1.2×0.8=10÷2.5=8×1.25=3 2020-07-19 …
一.计算题(一)直接写出得数:0.3+0.57=0.54÷6=2.2×5+9=2.4×0.5=8-0 2020-11-17 …
(1)观察上面一系列算式,你发现什么规律?(2)用规律,计算2011^2-2009^2.给出下列算式 2020-12-05 …