4.05÷0.854.05 3.24÷1.13.24
0.37÷0.60.37×0.6 7.8×0.17.8÷10
450000=万 9680000000=亿
378040000=亿 150020=万
0.76×101 6.75+1.84+0.16
0.125×0.4×80×2.5 1.38+1.38×99