马戏团有1只老虎,3只猴子,黑熊和老虎一样多,问马戏团有几只动物?
直接写出得数.= 15= = =0.33= = = =1﹣= = = =
×= 1÷= 4×60%= 0.875÷0.125=÷2= 10÷= ×3.6= 0×=
直接写得数.= = 1÷40%== = 72×25%==
直接写出下列题目的得数.7+66.3= ÷= ×÷=14÷= ÷20%= (+)×20=
口算.============