Compute the following differences
45−12−10
Für diese Aufgabe benötigst Du folgendes Grundwissen: Subtraction
45−12−10
Subtract from right to left. Subtract the ones first: 5−2=3
45−12−103
Now subtract the tens: 4−1−1=2.
45−12−1023
The result is therefore 23.
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58−13−4
Für diese Aufgabe benötigst Du folgendes Grundwissen: Subtraction
58−13−4
Subtract from right to left. Subtract the ones first: 8−3−4=1.
58−13−41
Now subtract the tens: 5−1=4.
58−13−441
The result is therefore 41.
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87−65−12
Für diese Aufgabe benötigst Du folgendes Grundwissen: Subtraction
87−65−12
87−65−120
Now subtract the tens: 8−6−1=1.
87−65−1210
The result is therefore 10.
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90−15−58
Für diese Aufgabe benötigst Du folgendes Grundwissen: Subtraction
90−15−58
Subtract from right to left. Subtract the ones first. Since 5+8 is greater than 0, and even greater than 10 you need to calculate 20−5−8=7 instead and memorize a 2 at the tens digit.
90−15−5287
Now subtract the tens: 9−1−5−2=1.
90−15−52817
The result is therefore 17.
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87−25−50
Für diese Aufgabe benötigst Du folgendes Grundwissen: Subtraction
87−25−50
Subtract from right to left. Subtract the ones first: 7−5=2.
87−25−502
Now subtract the tens: 8−2−5=1.
87−25−5012
The result is therefore 12.
Do you have a question?
96−37−25
Für diese Aufgabe benötigst Du folgendes Grundwissen: Subtraction
96−37−25
Subtract from right to left. Subtract the ones first. Since (7+5) is greater than 6, you need to calculate 16−(7+5)=4 instead and memorize a 1 at the tens digit.
96−37−2154
Now subtract the tens: 9−3−2−1=3
96−37−21534
The result is therefore 34.
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