How to subtract - SSAT Elementary Level Quantitative

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Question

\dpi{100} 342-31=

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Answer

Write 342. Write 31 just below it, with the 3 under the 4, and the 1 under the 2. Now subtract straight down, starting on the right side.

\dpi{100} 2-1=1

\dpi{100} 4-3=1

\dpi{100} 3-0=3

Our answer is 311.

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