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Extended Math Facts

If you have memorized the basic math facts, you can solve problems such as 8*70 and 5,000 * 3 mentally.
AB
8*100800
1000 * 4949000
7 * 7004900
5000 * 945000
90 * 403600
800 * 6048000
60 * 7000420000
40 * 50020000
85 * 1008500
80 * 5000400000
10 * 4004000
56 * 1005600
90 * 100090000
400 * 4016000
90 * 706300
6 * 4002400
70 * 5003500
3000 * 515000
11 * 2002200
120 * 30036000

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