| 简便计算. (1)37.9×94+37.9×7-37.9. (2)8888×1111+4444×7778. |
| (1)37.9×94+37.9×7-37.9, =37.9×94+37.9×7-37.9×1, =37.9×(94+7-1), =37.9×100, =3790; (2)8888×1111+4444×7778, =4444×2×1111+4444×7778, =4444×(1111×2+7778), =4444×10000, =44440000. |
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