问题
解答题
49×190≈
659÷35≈
997045+2973204≈
5463-2948≈
答案
49×190≈50×200=10000,
659÷35≈700÷35=20,
997045+2973204≈1000000+3000000=4000000,
5463-2948≈5500-3000=2500.
49×190≈
659÷35≈
997045+2973204≈
5463-2948≈
49×190≈50×200=10000,
659÷35≈700÷35=20,
997045+2973204≈1000000+3000000=4000000,
5463-2948≈5500-3000=2500.