1) 45*58=2610
2) 34*45=1530
3) 8*45=360
4) 67*78=5226
5) 68*67=4556
6) 67*78-68*67=5226-4556=670
7) 13400:670=1340:67=20
8) 2610+1530+360-20=4480
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1) 45*58=2610
2) 34*45=1530
3) 8*45=360
4) 67*78=5226
5) 68*67=4556
6) 67*78-68*67=5226-4556=670
7) 13400:670=1340:67=20
8) 2610+1530+360-20=4480