124.68+324.68+524.68+724.68+924.68=______.
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/18 16:05:33
124.68+324.68+524.68+724.68+924.68=______.
124.68+324.68+524.68+724.68+924.68
=(100+24+0.6+0.08)+(300+24+0.6+0.08)+(500+24+0.6+0.08)+(700+24+0.6+0.08)+(900+24+0.6+0.08)
=(100+300+500+700+900)+(24+24+24+24+24)+(0.6+0.6+0.6+0.6+0.6)+(0.08+0.08+0.08+0.08+0.08)
=[(100+900)+(300+700)+500]+24×5+0.6×5+0.08×5
=[1000+1000+500]+120+3+0.4
=2500+120+3+0.4
=2620+3+0.4
=2623+0.4
=2623.4.
故答案为:2623.4.
=(100+24+0.6+0.08)+(300+24+0.6+0.08)+(500+24+0.6+0.08)+(700+24+0.6+0.08)+(900+24+0.6+0.08)
=(100+300+500+700+900)+(24+24+24+24+24)+(0.6+0.6+0.6+0.6+0.6)+(0.08+0.08+0.08+0.08+0.08)
=[(100+900)+(300+700)+500]+24×5+0.6×5+0.08×5
=[1000+1000+500]+120+3+0.4
=2500+120+3+0.4
=2620+3+0.4
=2623+0.4
=2623.4.
故答案为:2623.4.
125×(4+8)=______×______+______×______.
填质数:21=______+______=______×______=______-______.
3.76°=______度 ______分 ______秒.
填上适当的质数.24=______+______=______+______=______+______.
巧填单位名称.1______-59______=1______;1______-9______=1______;1___
0.87×99+0.87=______×______.
0.125=5:______=______%=______÷______.
根据1.2×4=0.6×8,可以写成比例______:______=______:______.
0.4:1.2=0.6:1.8可改写成______×______=______×______.
______升______毫升=4050毫升 6.25小时=______时______分.
从36的约数中选出4个数组成比例:______:______=______:______.
27046=2×______+7×______+4×______+6×______.