甲数是7.18,比乙数少3.6,甲、乙两数的和是多少?
直接写得数= = 81×= 0÷== = = =
直接写出得数21×= ÷2= ﹣= 12÷=÷0.8= 12÷= 4﹣2= 14×÷14×=
计算:+= ﹣= 12×= ÷=0×+9= ÷3= ×14= 20÷=1.25××8= 14×÷14×=
+= 6÷= ×0.25= ÷=×= 9﹣= ÷42= 1÷=
口算= = = =÷= ×36= ÷3= 6÷=