(2)根据(1)的计算结果解答即可.解答:解:(1)①(1×102)×(2×104)=2×106, ②(2×104)×(3×107)=6×1011, ③(3×107)×(4×104)=1.2×1012, ④(4×105)×(5×1010)=2×1016; 故答案为:2×106;6×1011;1.2×1012;2×1016; (2)(a×10n)×(b×10m)=ab×10m+n=c×10p, 所以m+n=p. 5、(1)∵0.1= 1 10 =10-1,0.01= 1 100 =10-2,0.001= 1 1000 =10-3,… ∴0.0001=10-4,0.00001=10-5; (2)0.000001768=1.768×10-6. 对于这个问题我有话说 (责任编辑:admin) |