Without a calculator, you can break it up like the above:
45=40+5=20+20+5
so
192*45=192*20+192*20+192*5
=3840+3840+960
=?
When Maggie goes on birding watching trips, she sees at least 45 birds. She has taken 12 bird watching trips a year over the past 16 years. How many birds has Maggie seen?
Write the missing numbers:
12*16 = 192
192* 45 = 192 x (____ + ____)
= (192 X____)+(192 X ____)+(192X ___)
= ______ + _______ + ______
= _______
1 answer