几道简算题3计算：1.45×2.08+1.5×37.62.52×11.1+2.6×7783.48×1.08+1.2×56.84.72×2.09－1.8×73.6

Question

几道简算题3
计算：
1.45×2.08+1.5×37.6
2.52×11.1+2.6×778
3.48×1.08+1.2×56.8
4.72×2.09－1.8×73.6

Answer 1

45×2.08+1.5×37.6
= 1.5×62.4＋1.5×37.6
= 1.5×（62.4＋37.6）
= 150
52×11.1+2.6×778
= 2.6×222＋2.6×778
= 2.6×（222＋778）
= 2600
48×1.08+1.2×56.8
= 1.2×43.2＋1.2差56.8
= 1.2×（43.2＋56.8）
= 120
72×2.09－1.8×73.6
= 1.8×83.6－1.8×73.6
= 1.8×（83.6－73.6）
= 18