②苹果每千克2.4元，1.5千克{#blank#}2{#/blank#}元.

③买1千克橘子和2千克苹果一共{#blank#}3{#/blank#}元

1.3×0.5＝    2.5×6＝    1.8×0.4＝    1.6×0.5    9.1﹣2.8＝

4.6+3.7＝    3×2.8＝    1.9×0.3＝    1.25×2.3×0.8＝    2.5×5.6×4＝

31.5×0.9{#blank#}1{#/blank#}31.5            5.42÷0.9{#blank#}2{#/blank#}5.42     

0.98×1{#blank#}3{#/blank#}0.98             2.5×0.8{#blank#}4{#/blank#}2.5÷0.8   

 3.56÷1.01{#blank#}5{#/blank#}3.56              4.95÷1{#blank#}6{#/blank#}4.95

1×0.9{#blank#}3{#/blank#}1                  3.7×6.1{#blank#}4{#/blank#}37×0.61