This math topic focuses on subtracting numbers using base 10 blocks in a simple context where no borrowing is needed. Each problem presents a visual representation of blocks representing tens and ones and asks the student to select the correct subtraction equation based on the blocks shown. The subtraction problems involve only tens and single units with multiple-choice answers, making it an introductory level task to understand basic subtraction concepts using visual aids.
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Choose the subtraction sentence if the second group is subtracted from the first?